EP1764512A1 - Joint d'étanchéité d'arbre - Google Patents

Joint d'étanchéité d'arbre Download PDF

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Publication number
EP1764512A1
EP1764512A1 EP05020183A EP05020183A EP1764512A1 EP 1764512 A1 EP1764512 A1 EP 1764512A1 EP 05020183 A EP05020183 A EP 05020183A EP 05020183 A EP05020183 A EP 05020183A EP 1764512 A1 EP1764512 A1 EP 1764512A1
Authority
EP
European Patent Office
Prior art keywords
shaft
seal
labyrinth seal
drive
labyrinth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05020183A
Other languages
German (de)
English (en)
Other versions
EP1764512B1 (fr
Inventor
Hans W. Möllmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paul Bungartz & Co GmbH KG
Original Assignee
Paul Bungartz & Co GmbH KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Paul Bungartz & Co GmbH KG filed Critical Paul Bungartz & Co GmbH KG
Priority to EP05020183A priority Critical patent/EP1764512B1/fr
Priority to AT05020183T priority patent/ATE463674T1/de
Priority to DE502005009371T priority patent/DE502005009371D1/de
Publication of EP1764512A1 publication Critical patent/EP1764512A1/fr
Application granted granted Critical
Publication of EP1764512B1 publication Critical patent/EP1764512B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • F04D29/108—Shaft sealings especially adapted for liquid pumps the sealing fluid being other than the working liquid or being the working liquid treated

Definitions

  • the invention relates to a shaft gap seal for a horizontally disposed driven shaft with drive side and a working side, wherein between the drive side and the working side of a labyrinth seal is provided with a number of grooves.
  • double mechanical seals which are lubricated by a harmless medium for the environment, as well as magnetic or canned motors suitable, with magnetic coupled pumps and pumps with canned motor respectively the bearing of the shaft carried out by running in the medium plain bearing and no shaft bushing is present.
  • This can also be used for environmentally hazardous media sealing systems has in common that a dry running of the sealing systems or a failure of the lubrication system leads to a strong deterioration of the sealing system to destruction of the same, since the storage is affected by contact with a working fluid with a higher solids content and the containment shell or the can is separated.
  • the object of the invention is therefore to avoid the aforementioned disadvantages and to provide a possibility for the Wellenspaltabdichtung a horizontally disposed shaft, which can be used in highly toxic media as well as in media with high solids content and achieved with a high reliability even without extensive monitoring becomes.
  • the working side of the particular forming part of a centrifugal pump shaft can be filled with liquid, so that corresponding liquid media can be pumped.
  • a circumferential collecting groove for against the sealing gas flow through the labyrinth seal penetrating liquid can be provided, and the collecting groove can via a return line provided on the underside with the region of the working end the labyrinth seal, in particular with the immediate working end of the labyrinth seal, be connected, so that even with a small leakage to the sealing gas flow, which seeps due to gravity at the bottom of the shaft or the labyrinth, so far through the seal passing through the medium Return line to be returned and returned at the working end in the labyrinth seal. This even a leakage of low leakage through the labyrinth seal is avoided.
  • the return line may open at a distance of a few grooves in front of the working end of the labyrinth seal, so that a direct contact with the medium located in the working space is avoided. hereby For example, coarser solids located on the working side can not penetrate into the return line, but at most solids that are smaller than the shaft gap.
  • a return line may also be provided on the upper side.
  • the labyrinth seal may be formed as a comb seal, each with a narrow gap and a large chamber, so that through the narrow gap an accelerated flow is achieved and then in the chamber relaxation occurs.
  • an increased pressure loss is effected, so that along the comb seal results in an increased pressure difference.
  • the pressure difference between the drive side end on the one hand and the working side, d. H. liquid-side end of the comb seal on the other hand even given unfavorable operating conditions, and improved return transport occurring possibly at the bottom of the labyrinth leakage is achieved.
  • shaft seal may be provided which opens at sufficient sealing gas pressure and the sealing gas passes and closes at blocking gas failure, so that at active barrier gas flow through the open sealing lip at most a very low friction between shaft seal and Wave occurs, but prevented in case of failure of the sealing gas flow by closing the shaft sealing ring leakage into the storage area and this protected becomes. With renewed sealing gas supply, the leakage is then returned to the working space.
  • the labyrinth of the labyrinth seal can be provided on the shaft, in particular as part of the shaft, so that any solids entrained by the liquid leakage are thrown off there and then transported back to the working side by the barrier gas flow.
  • the drive side may be partially provided in a bearing housing and the shaft bushing from the bearing housing to be hermetically sealed by a split pot, wherein a magnetic coupling may be provided for torque transmission, so that there is a hermetic seal by the elimination of a shaft bushing.
  • the containment shell is in particular made of a material in which the rotating magnetic field scarcely causes, in particular, no eddy currents whatsoever.
  • the drive side may be partially provided in a bearing housing and the shaft passage from the bearing housing to the drive by a gas-locked mechanical seal, in particular single mechanical seal, sealed.
  • the gas-lubricated mechanical seal is sufficiently supplied by the sealing gas, and the determination of the sealing gas pressure can be done by the design of the shaft seal, by the pressure loss of the labyrinth seal and by the form of the medium.
  • the shaft may be part of a centrifugal pump and the impeller provided with back vanes, so that the pressure in front of the labyrinth is partially or even completely relieved of the pump delivery pressure, so that the required sealing gas pressure, and thus the per unit time required sealing gas quantity is also minimized ,
  • the housing enclosing the labyrinth seal can be constructed so that the heat transfer from the working side to the drive side is minimized, and there can be a good otherwise removal of the work-side introduced heat to the environment, for example, by the heat introduced to the environment cooling fins or the like, be ensured, so that even at high operating temperatures can be used.
  • Fig. 1 shows a centrifugal pump 1 with a horizontally disposed driven shaft 2, which extends between the drive side 3 and the working side 4.
  • the drive side 3 is a gas-flushed bearing side and the working side 4 represents the medium side, in particular the liquid side, with a medium inlet 5 and medium outlet 6.
  • the drive side 3 is hermetically sealed in the illustrated embodiment and provided with a magnetic coupling 7 with split pot 8.
  • the impeller 9 of the centrifugal pump 1 is provided with back vanes 10.
  • the sealing gas supply 11 is provided on the upper side on the driven side of the shaft 2.
  • the sealing gas introduced through the sealing gas supply 11 flows past the shaft 2 in the direction of the working side 4, wherein it passes through a drive-side shaft sealing ring 13 before entering the labyrinth seal 12.
  • the labyrinth seal 12 is in the illustrated embodiment of a arranged on the shaft 2 and with this co-rotating labyrinth 14, a collecting groove 15 in the drive-side region of the labyrinth seal 12 with closing the return line 16, which opens in the working side region of the labyrinth 14 assigned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Sealing Devices (AREA)
EP05020183A 2005-09-16 2005-09-16 Joint d'étanchéité d'arbre Active EP1764512B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05020183A EP1764512B1 (fr) 2005-09-16 2005-09-16 Joint d'étanchéité d'arbre
AT05020183T ATE463674T1 (de) 2005-09-16 2005-09-16 Wellenspaltabdichtung
DE502005009371T DE502005009371D1 (de) 2005-09-16 2005-09-16 Wellenspaltabdichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05020183A EP1764512B1 (fr) 2005-09-16 2005-09-16 Joint d'étanchéité d'arbre

Publications (2)

Publication Number Publication Date
EP1764512A1 true EP1764512A1 (fr) 2007-03-21
EP1764512B1 EP1764512B1 (fr) 2010-04-07

Family

ID=35768440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05020183A Active EP1764512B1 (fr) 2005-09-16 2005-09-16 Joint d'étanchéité d'arbre

Country Status (3)

Country Link
EP (1) EP1764512B1 (fr)
AT (1) ATE463674T1 (fr)
DE (1) DE502005009371D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105090079A (zh) * 2014-05-14 2015-11-25 江苏核电有限公司 大型机械密封装配培训与在线检测平台
CN105201898A (zh) * 2015-10-24 2015-12-30 车晋绥 胶泵新颖水封圈
CN112236006A (zh) * 2020-10-16 2021-01-15 安擎(天津)计算机有限公司 组合式服务器机架结构及其连接方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102377227B1 (ko) 2017-03-09 2022-03-22 존슨 컨트롤스 테크놀러지 컴퍼니 백투백 베어링 밀봉 시스템

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1867236A (en) * 1926-05-03 1932-07-12 Bbc Brown Boveri & Cie Gas sealed gland
US2911919A (en) * 1957-07-23 1959-11-10 C H Wheeler Mfg Co Pumping system
US2959133A (en) * 1957-09-23 1960-11-08 Allis Chalmers Mfg Co Hermetically sealed pump motor unit
DE1293390B (de) * 1957-05-28 1969-04-24 Commissariat Energie Atomique Vorrichtung zur Abdichtung eines zum Verdichten eines aetzenden, schaedlichen und/oder wertvollen Gases dienenden Kreiselkompressors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1867236A (en) * 1926-05-03 1932-07-12 Bbc Brown Boveri & Cie Gas sealed gland
DE1293390B (de) * 1957-05-28 1969-04-24 Commissariat Energie Atomique Vorrichtung zur Abdichtung eines zum Verdichten eines aetzenden, schaedlichen und/oder wertvollen Gases dienenden Kreiselkompressors
US2911919A (en) * 1957-07-23 1959-11-10 C H Wheeler Mfg Co Pumping system
US2959133A (en) * 1957-09-23 1960-11-08 Allis Chalmers Mfg Co Hermetically sealed pump motor unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105090079A (zh) * 2014-05-14 2015-11-25 江苏核电有限公司 大型机械密封装配培训与在线检测平台
CN105090079B (zh) * 2014-05-14 2018-11-02 江苏核电有限公司 大型机械密封装配培训与在线检测平台
CN105201898A (zh) * 2015-10-24 2015-12-30 车晋绥 胶泵新颖水封圈
CN112236006A (zh) * 2020-10-16 2021-01-15 安擎(天津)计算机有限公司 组合式服务器机架结构及其连接方法
CN112236006B (zh) * 2020-10-16 2022-10-04 安擎(天津)计算机有限公司 组合式服务器机架结构及其连接方法

Also Published As

Publication number Publication date
DE502005009371D1 (de) 2010-05-20
ATE463674T1 (de) 2010-04-15
EP1764512B1 (fr) 2010-04-07

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